This GetOpt patch was sent the the libraries list by Eelis van der Weegen
with the explanation:
There is a bug in System.Console.GetOpt causing it to mistakenly reject
options as ambiguous. Example:
  optsDesc = [Option "" ["color", "colour"] (ReqArg id "color") ""]
Output:
  option `--col' is ambiguous; could be one of:
      --color=color, --colour=color  Foreground color
      --color=color, --colour=color  Foreground color
This error is silly, because the two alternatives listed are the same option.